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Precisometer

Power stability, linewidth, beam quality

FC-633633 nm red CW laser

633 nm

The FC-633 is a 633 nm continuous-wave direct diode laser. Electrical current creates optical gain in a semiconductor junction, and the diode generates the laser light directly. Optical feedback selects the oscillating modes, while drive current and junction temperature affect output power and wavelength. The TTL and analog modulation options control different things: TTL gates the beam on and off, while analog control varies its intensity. Modulation bandwidth sets how quickly the source can follow a changing command. The specified fiber connection delivers the generated light to the experiment; its core size, numerical aperture and connector need to match the receiving optics.

Datasheet (PDF)View FC familyBack to CW LasersBrowse all laser models

Specifications

FC-633

16 specification rows

Output / average power1~1000 mW
Beam / notes633 nm Red Diode Laser
Central wavelength (nm)633±3
Operating modeCW
Output power after fiber (mW)1-1000
Power stability (rms, 4 hours ± 3°C)<2%, <1%, <0.5%
Fiber core diameter400µm, 0.22 NA
Fiber connectorSMA905, FC/PC optional
Fiber length1m
Fiber jacketMetal, PVC optional
Warm-up time (minutes)<5
Cooled methodAir cooled
Operating temperature (℃)10-35
Operating voltage (VAC)100-240
Modulation optionDC-1kHz, 1kHz-10kHz, 10kHz-30kHz optional; TTL and Analog optional
Expected lifetime (hours)>10000

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Model selection

Nearby series comparison

Compare FC-633 with the closest available models in the CW Lasers family.

Selection parameterFC-633 (current)MRL-633(FC)MDL-C-633
Wavelength633 nm633 nm633 nm
Optical power / pulse energy1~1000 mW1~70 mW1~50 mW
Operating mode / pulse widthCW——

Related cw lasers

Compare the FC-633 with nearby cw lasers across the wavelength range.

Choosing a laser

Guides that put this laser in context

Which specifications decide the experiment, and which ones cost money without changing the result.

All guides
Laser emission spectrum, intensity noise traces, and beam quality profiles illustrating the main laser specifications
Photonics
13 min Spec lab

Laser specifications decoded

Linewidth, spectral width, RIN, M², and coherence length answer five different questions. Translate each into the units your experiment is designed in — and learn which ones not to pay for.

Open guide
Low-noise laser head and controller of the type specified for optical trapping
Optical trapping
16 min 2 simulations

Choosing a laser for optical tweezers

Why wavelength is decided by photodamage, focal heating, and detector bandwidth rather than trapping force — and what laser noise costs you in piconewtons.

Open guide
Fluorescently labeled cells in a sharp confocal focal plane
Confocal microscopy
14 min Design lab

Designing a confocal fluorescence excitation system

Connect fluorophores, pinhole size, Airy units, spatial sampling, scan timing, modulation, and power after the fiber in one practical design workflow.

Open guide